Device for testing pole-windings



. 1 F.v CULL IN.

DEVICE FOR TESTING POL E WINDINGS.

A'PPL-PCATIOH HLED DEC. 29, 1919.

1,345,075. f -PatentedJune29,1920.

3% 5 INVENTOR as a? C1 \\\iw ATTOR N EY Q In the drawing,

vation of this improved testing machine.

" UNITED STATES PATENT OFFICE.

.TASPERF. OULLIN, 0F DETROIT MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

WILLIAM J. HARTWIG", OF DETROIT, MICHIGAN.

DEVICE FOR TESTING POLE WINDINGS.

Specification of Letters Patent. Patented J un 29, 1920.

Application filed December 29, 1919. Serial No. 348,086.

To all whom it may concern Be it known that I, JASPER F. CULLIN, a citizen of the United States, and residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Device for Testing Pole- Windings, of which the following is a specification.

This invention consists in simple and (ef fective means for testing the windings of the field coils of motors and dynamos, preferably before these windings are permanently united, and comprises a series of cores on which the windings may be mounted, and a magnetic needle adjacent each core which may be moved to a plurality of indicating positions according to the polarity of the adjacent end of the core when energized by a current in'the coil mounted on the core. It also consists in marking opposite poles ofadjacent needles so that these markings will indicate correct or incorrect windings of the coils. It further. consists in the details of construction illus trated in the accompanying drawing and particularly pointed outin the claims.

Figure 1 is a front ele- Fig. 2 is a plan thereof. Fig. 3 is a section on the line 33 of Fig. 2 on a larger scale. Fig. 4 is an elevation of the needles when the poles are properlv energized. Fig. 5 is a diagram showing the coils properly connected. v

Similar reference characters refer to like parts throughout the several views.-

This improved testing machine has .a base a 1 preferably of non-conducting or poormaterial, and to it 'aresecured conducting 3, 4, and 5 of soft steel or the poles 2, iron which and lose magnetism. Field cores of the electric machines for which the coils are intended may beemployed. A small block 6 supports one end of the carrier 7, preferably of wood, the other end of which rests on theblock 8, being pivoted on the screw 9 and held down by an L-shaped spring clip 10. Any other desired method of mounting this carrier 7 may be employed.

This carrier is formed with chambers,

12 and is drilled and tapped to receive the screw-plugs 13 14 at their front ends. Across the chambers 12 is a narrow bar 15' of metal, secured to 'by the bar 15.

the in properly may easily'be impressed with' the 'art without departing which have conical bearings the bar 7 at its ends, and carrying adjustable screws '16, held from turning by jam nuts 17. These screws have conical bearings 18 and in these and in the conical bearings 14: in the plugs 13 are mounted the pintles 19 which support the magnetic needles 21, 22, 23 and 24. Each of these needles is preferably provided with a small counterweight 25 which normally holds it horizontal, and alternate needleshave their N arms colored or otherwise marked and the other needles have their S ends thus marked. These needles are normally hidden Binding'posts 27 and 28 are connected to any desired current source by means of wires 29 and 30.

As indicated in jacent field coils arg reversed, that is, the windings of the coils 32.and 34 are in the opposite direction from those of coils 33 and to the posts 27 and 28, when current will pass and the pole pieces will be magnetized, lipper ends of alternate pole pieces be-' 25 is then swung into the position shown in Fig. 1, whereupon the needles'will all assume vertical positions, alternate needles having their N poles up. If the coils are all placed and connected, the upper ends of the needles will all be marked while the lower ends are plain, or the reverse, as

may be predetermined. But if one or all the coils are improperly placed, one or In of the needles will be wrong end up, indicating that one or more of the coils must be turned over or reversed. When all the coilsare in proper order, the twisted ends of the windings are soldered together and taped, after which the coils are ready for use.

The details and proportions of this device may all be varied by those skilled in from the spirit of my invention as set'forth in the following claims.

I claim 1. In a testing device for coils of electric machines, the combination of a series of cores to hold the coils and means to conduct current to the coils, a magnetic needle adthe position shown in Fig. '1,

Fig. 5, the windings of adand of the others S. The carrier 7 jace'nt each. core, and means to support the needles.

2. In a testing device for coils of electric machines, the combination of a series of vertical cores to hold the coils and means to conduct current to the coils, a normally horizontal magnetic needle adjacent each core, and. a horizontal axis for each needle.

3. In a testing device for coils of electric machines, the combination of a series of vertical cores to hold the coils and means to conduct current to the coils, a. normally horizontal magnetic needle adjacent each core, and a horizontal axis for each needle,

position by the action of the core when magnetized by the current in the coil.

4. In a testing device for coils of electric machines, the combination of a series of vertical cores to hold the coils and means to conduct current to the coils, a normally horizontal magnetic needle adjacent each core, and a horizontal axis for each needle, one of the arms of each needle having a pre determined marking, the marked arms of adjacent needles havin opposite olarity.

JAS- ER F. CUELIN. 

